Python: tkinter实例改名小工具

#!/usr/bin/env python
#coding=utf-8
# 
# 版权所有 2014 yao_yu (http://blog.csdn.net/yao_yu_126)
# 本代码以MIT许可协议发布
# 文件名批量加.xls后缀
# 2014-04-21  创建
# 

import os
import tkinter  as tk
from tkinter    import ttk



version = '2014-04-21'
app_title = '文件名批量加后缀 Ver:' + version

listdir = os.listdir
isdir = os.path.isdir
isfile = os.path.isfile
path_join = os.path.join

#----------------------------  Object Visit   ----------------------------#
def visit_directory_files(root, visitor):
    for i in listdir(root):
        i = path_join(root, i)
        if isdir(i):
            if visit_directory_files(i, visitor):
                return True
        elif isfile(i):
            if visitor(i):
                return True

#----------------------------    Visitor   ----------------------------#
class ListVisitor(object):
    def __init__(self, *visitors, terminate = True):
        if (visitors 
                 and isinstance(visitors, (list, tuple)) 
                 and isinstance(visitors[0], (list, tuple))):
            visitors = visitors[0]
        self._visitors = list(visitors)
        self._terminate = terminate
    def __call__(self, *args, **kwdargs):
        for visitor in self._visitors:
            if visitor(*args, **kwdargs):
                return self._terminate
    def append(self, visitor):
        assert(visitor)
        self._visitors.append(visitor)

def get_screen_size(window):
    return window.winfo_screenwidth(),window.winfo_screenheight()
  
def get_window_size(window):
    return window.winfo_reqwidth(),window.winfo_reqheight()
  
def center_window(root, width, height):
    screenwidth = root.winfo_screenwidth()
    screenheight = root.winfo_screenheight()
    size = '%dx%d+%d+%d' % (width, height, (screenwidth - width)/2, (screenheight - height)/2)
    root.geometry(size)
    
class Application(object):
    def __init__(self, master):
        self.master = ttk.Frame(master)
        self.master.pack(side = tk.TOP, expand = tk.YES, fill = tk.BOTH)
        self.create_widgets()
        
    def create_widgets(self):
        master = self.master
        master.columnconfigure(1, weight=1)
        master.rowconfigure(2, weight=1)
        self.targetdir = tk.StringVar()
        self.targetdir.set('/Volumes/Data/Document/Test')
        padx = 5
        pady = 10
        ttk.Label(master, text="操作目录").grid(row = 0, column = 0, stick = tk.E, padx = padx, pady = pady)
        ttk.Entry(master, textvariable = self.targetdir).grid(row = 0, column = 1, stick = tk.EW, padx = padx)
        commands = ttk.Frame(master)
        commands.grid(row = 1, column = 0, columnspan = 2)
        ttk.Button(commands, text="开始", command = self.onStart).pack(side = tk.LEFT)
        ttk.Button(commands, text="退出", command = master.quit).pack(side = tk.LEFT)
        
        self.status = tk.StringVar()
        self.status.set('就绪')
        master.rowconfigure(3, minsize = 160)
        ttk.Label(master, textvariable = self.status, wraplength=600).grid(row = 3, column = 0, columnspan = 2, padx = padx, stick = tk.NSEW)
        self.progress = ttk.Progressbar(master, maximum=100, orient=tk.HORIZONTAL, mode='determinate')
        self.progress.grid(row = 4, column = 0, columnspan = 2, padx = padx, stick = tk.NSEW)
        
    def onStart(self):
        targetdir = self.targetdir.get().strip()
        basename = os.path.basename(targetdir)
        if os.path.isdir(targetdir):
            listvisitor = ListVisitor(ProgressVisitor(self.progress),
                                        self.StatusVisitor(),
                                        FileLogVisitor(basename),
                                        #FileRenameVisitor(basename),
                                        )
            visit_directory_files(targetdir, listvisitor)
        else:
            self.status.set('目标目录不存在')
    
    def StatusVisitor(self):
        print_status = self.status.set
        def __call__(file):
            __call__.n += 1
            print_status('%s,%s' % (__call__.n, file))
        __call__.n = 0
        return __call__

splitext = os.path.splitext
file_rename = os.rename
knownexts = dict.fromkeys(['.jpg', '.log', '.pdf', '.tif', '.xls', '.zip', '.rar'])
class FileRenameVisitor(object):
    def __init__(self, file):
        self.__fp = open('%s_%s_rename.txt' % (os.path.splitext(__file__)[0], file), 'w')
    def __call__(self, file):
        ext = splitext(file)[1].lower()
        if ext not in knownexts:
            file_rename(file, file + '.xls')
            self.__fp.write('%s
' % file)
    def __del__(self):
        self.__fp.close()

class FileLogVisitor(object):
    def __init__(self, file):
        self.__fp = open('%s_%s_all.txt' % (os.path.splitext(__file__)[0], file), 'w')
    def __call__(self, file):
        self.__fp.write('%s
' % file)
    def __del__(self):
        self.__fp.close()

class ProgressVisitor(object):
    COUNT = 202
    def __init__(self, progress, count=COUNT):
        self.progress = progress
        if count and isinstance(count, int) and count > 0:
            self.count = count
        else:
            self.count = self.COUNT
        self.n = 1
    def __call__(self, *args, **kwdargs):
        self.n += 1
        if self.n == self.count:
            self.progress.step()
            self.progress.update()
            self.n = 1
    def __del__(self):
        self.progress['value'] = 0
        

if __name__ == '__main__':
    root = tk.Tk()
    root.title(app_title)
    app = Application(root)
    center_window(root, 600, 240)
    tk.mainloop()